Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe052f4be7cd242…

MALICIOUS

PDF

42.6 KB Created: 2020-09-01 13:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fecb6de5657342019dcbe84f335145b SHA-1: 898ad6b289a5a196d6f1ec3a82b229dde302b4f6 SHA-256: efe052f4be7cd242abdc4fa6b4ba07dd50c0d37de35dae4d38396ee49dcc8a52
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body, though heavily obfuscated, contains the malicious URL. The presence of a link farm further suggests an attempt to manipulate search engine results or distribute malicious content.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=past+perfect+tense+worksheet+pdf+with+answers
    • https://static.usrfiles.com/ugd/cec570_3f62152ccf58408a9ccb4f20fc2242c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b798244337974331a7ca0fb43a6ad61f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9230c86d10a04fcba2dab7aade11405f.pdf
    • https://static.usrfiles.com/ugd/b8c837_80af681399124cbe9b894ce3f21d82c8.pdf
    • https://static.usrfiles.com/ugd/5bb01c_29a8bca2d8dd4f49a1466d241016b867.pdf
    • https://static.usrfiles.com/ugd/b8c837_8706d0520cde4725995667a63ef28ff4.pdf
    • https://static.usrfiles.com/ugd/0d002d_67bce454b9b44ac1beec59c82fd1b855.pdf
    • https://static.usrfiles.com/ugd/b8c837_258c5ebfe2f44e61ae08dfc4b160009d.pdf
    • https://static.usrfiles.com/ugd/9ea91e_29a4ec258c8e444abcca13eed460e408.pdf
    • https://static.usrfiles.com/ugd/22bf55_7b437c07dd484fb5b94cc3e43ed087b7.pdf
    • https://static.usrfiles.com/ugd/efb3f0_be0cc2ddbec34fdea693604bf76058ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_b22a068bcf0949e3abe4af7e7f038f4d.pdf
    • https://static.usrfiles.com/ugd/ae059d_6248a82455da41c19656644d33b07f60.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006856.bin
b96077981860afb48df6d143ea25d2d8ce503b296df9a782aeac4c72c1b1fe83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6856 5368 bytes
font_01_sfnt_off00007aa7.bin
6e5f6154c4d14e57ea7a7b78b306193b6d58156963d3cb90a5c76d6d8595539e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA7 10280 bytes

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